Electric receptacle



Aug. 2Q, 1935. J K 2,012,03

ELECTRIC RECEPTACLE Filed Dec. 28, 1932 Fig CZ a3 figma gfi 32 /2' 30 30INVENTOR Harman f ['oo/r ATTORNEYS Patented Aug. 20, 1935 i Claims. (01.1'13 s30) This invention relates to improvements in duplex receptaclesfor electrical circuit plugs.

Its object is to provide a new arrangement of parts which may be readilyassembled to pro- 5 vide a device of sturdy construction at low costwithout sacrificing any of the desired characteristics of devices ofthis kind.

I will describe my invention in the following specification and pointout its novel features in appended claims. 1

Referring to the drawing, 7

Fig. l is a central sectional side elevation of a receptacle which ismade according to and embodies this invention, the section being takenon the irregular line l--l of Fig. 2 and Fig. 6;

Fig. 2 is a front plan View and Fig. 3 a rear plan view of the deviceshown in Fig. 1;

Figs. 4 and 5 are sectional end elevations of the device, thesectionsbeing taken respectively on lines 4-4 and 5--5 of Fig. 1;

Fig. 6 is a rear planview of the body upon which the other parts areassembled, with one of the contact members inserted in it;

Fig. 7 is a plan view of three of the parts showing how they are stampedout of one piece of sheet metal to conserve material;

Fig. 8 is a plan View of a piece of sheet insulation which is used as apart of the structure; and

Fig. 9 is a perspective View of one of the contact plates.

' l0 designates a body of molded insulating material, such as bakelite.ture comprising two spaced face plates through each of which are spacedslots l2. The adjacent sides l3 of these plates are parallel and arectangular space is left between them under which is a transversegroove l4 and a centrally disposed hollow boss i5.

between them and 22, 23 designate end walls. These walls form pocketsfor the reception of the contact plates. Each of these comprises ametallic strip 39 with spring contact blades 3| affixed to its end andbinding screws 32 intermediate its ends. When inserted in these pocketsthe inner edges of strips 3!! are seated on lugs 24. For a purpose whichwill appear later, the web 2! and the central part of end wall 22 do notextend beyond the outer edges of strips 30, but the end wall 23 ishigher. the side walls 20 are also higher and lugs 25 project inwardlyfrom them. The central part of the side walls cut down as at 26 providesaccess to the binding screws 32. V

This is a unitary struc- II V 20, 20 designate side walls, 2| a centralweb The ends of s.

40 is a supporting plate having an opening 4| which fits over the walls20, 2B, 22 and 23 back of the face plates H andhaving slotted ears 42.

59 is a flat piece of insulating material which is slid over the contactplate strips 36 and under the four lugs 25. Over this a metallicretaining plate is placed between the'insulating piece 563 and the. lugs25. This plate 69 has prongs 6i extending longitudinally from its ends.

it is a metallic locking member, perforated near its ends as at H andhaving a central threaded boss l2. When the parts are assembled asdescribed this member is slid transversely under supporting plate 40into the space between the face plate sides Hi. The groove l4 providesclearance for the boss 12. Now parts 43 of the supporting plate areindented into the perforations ll as seen most clearly in Fig. 5. Thisprevents further movement of the member ll]. At the same time the prongs6| of retaining plate 6i] are bent over the walls 22 and 23 so that ittoo is secured in place.

. From Fig. 7 it may be seen that the supporting plate 4!], theretaining plate 6 and the locking member l0 may be stamped out of asingle piece of sheet metal of no greater dimensions than are needed toform the supporting plate. Thus, with a minimum of material and ease ofassembly a receptacle is provided at low cost without sacrifice ofstrength, insulating properties, or any other characteristic which isdesired of an electrical fixture of this kind.

The specific embodiment of the invention which hasbeen shown anddescribed is a duplex socket, but it is apparent'tha't some of its novelfeatures may be utilized in other devices and I intend no limitationsother than those imposed by the following claims.

' projecting inwardly from said walls over the retaining plate.

2. A body'of insulating material having pocket forming side walls, a'current carrying devicev within said walls, a piece of insulationbetween the walls over said device, a metallic retaining plate betweenthe walls over-the piece, lugs projecting inwardly from said Walls overthe retaining plate, and means for preventing longitudinal displacementof said plate. 7

3. A body of insulating material having pocket from said walls over theretaining plate, said re taining plate having portions bent down ontothe end walls,

4. A" body of insulating material having side walls, end walls and anintermediate web forming separate pockets, a current carrying device ineach of said pockets, a piece of insulation be-' tween the side wallsover said devices, a metallic retaining plate between the side walls andover said piece, and lugs projecting inwardly from the 7 side walls overthe retaining plate, said retaining plate having prongs bent down uponthe end walls.

5. A body of insulating material constructed to form spaced pairs ofslots and having side walls, end walls and an intermediate web formingseparate pockets, a contact bar in each of said pockets havingspringcontacts opposite said slots, a piece of insulation between theside walls over said contact bars, a metallic retaining plate betweenthe side walls and over said piece, and lugs projecting inwardly fromthe side walls over the retaining plate, said retaining plate havingprongs HARMON J. COOK.

